CVE-2026-98576: Linux kernel · nfc: llcp: fix slab-out-of-bounds reads when logging service names
Affects Linux kernelSource GCVE Database
Not known to be exploited.
Data as of 28 Oct 2026, 01:28 UTC
Rated by Threat Radar · CVSS not yet scored by NVD
Exploitation evidence
Disclosed: evidence found.
CVE published 18 Oct 2026
Detectable: no evidence on record.
No public nuclei template indexed
Weaponised: no evidence on record.
No public exploit code indexed in Metasploit or Exploit-DB
Exploited in the wildExploited: no evidence on record.
Not in CISA KEV and no source reports exploitation
Observed by OffSeq MirageSeen by Mirage: no evidence on record.
No attack traffic recorded by OffSeq Mirage sensors
A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 26 Oct 2026.
What to do
Affected software
| Product | Affected | Fixed in |
|---|---|---|
Ubuntu 26.04 LTSlinuxpkg:deb/ubuntu/linux?arch=source&distro=resoluteOther threats | Affected
| Fixed in– |
Ubuntu 26.04 LTSlinux-awspkg:deb/ubuntu/linux-aws?arch=source&distro=resoluteOther threats | Affected
| Fixed in– |
Ubuntu 26.04 LTSlinux-azurepkg:deb/ubuntu/linux-azure?arch=source&distro=resoluteOther threats | Affected
| Fixed in– |
Ubuntu 26.04 LTSlinux-azure-fdepkg:deb/ubuntu/linux-azure-fde?arch=source&distro=resoluteOther threats | Affected
| Fixed in– |
Ubuntu 26.04 LTSlinux-gcppkg:deb/ubuntu/linux-gcp?arch=source&distro=resoluteOther threats | Affected
| Fixed in– |
Ubuntu 26.04 LTSlinux-gkepkg:deb/ubuntu/linux-gke?arch=source&distro=resoluteOther threats | Affected
| Fixed in– |
Check your own hosts for these packages with threat-finder (opens in a new tab), our free open-source scanner.
Description
In the Linux kernel, the following vulnerability has been resolved: nfc: llcp: fix slab-out-of-bounds reads when logging service names nfc_llcp_wks_sap() and nfc_llcp_build_sdreq_tlv() pass non-null- terminated strings to pr_debug() using the %s format specifier. The buffers are allocated via kmemdup() or come from netlink attributes and are not guaranteed to be null-terminated, causing __dynamic_pr_debug() to read beyond the allocated region: KASAN: slab-out-of-bounds Read in __dynamic_pr_debug Fix both call sites by using %.*s with the explicit length to limit the output to the actual length of the string.
References
- ubuntu.com/security/CVE-2026-98576 (opens in a new tab)
- cve.org/CVERecord?id=CVE-2026-98576 (opens in a new tab)
- git.kernel.org/stable/c/75bfd9ef4da2fb49dac1f19880d2ac4ccd07b45b (opens in a new tab)
- git.kernel.org/stable/c/4262b12277a3e056c95fc49e9c4d7bd97035d16c (opens in a new tab)
- git.kernel.org/stable/c/8978dff632519712d1fa432991e1f2e857f90239 (opens in a new tab)
- git.kernel.org/stable/c/a143f7835faa4fe0178448289feea4f84eeee8d6 (opens in a new tab)
- git.kernel.org/stable/c/6d4ca872830e46fcca9c086bf19fa9bd2faf09d2 (opens in a new tab)
- git.kernel.org/stable/c/75f7c5a42fa1483f5912279a749417c284ad708f (opens in a new tab)
- git.kernel.org/stable/c/7dcf371a35632f035baf77bcf2c129165f772ce4 (opens in a new tab)
- git.kernel.org/stable/c/8afb6c194f5781798d3ab3edf243cf5a24a9d1f9 (opens in a new tab)